Crassignatha mengla Y. Lin & S. Li, 2020

Li, Ya, Lin, Yucheng & Li, Shuqiang, 2020, A review of Crassignatha (Araneae, Symphytognathidae), ZooKeys 988, pp. 63-128 : 63

Crassignatha mengla Y. Lin & S. Li sp. nov. Figs 12 , 13 , 38

Type material.

Holotype ♂ (IZCAS-Ar 40999) and paratypes 4♂ 8♀ (IZCAS-Ar 41000-41011), China: Yunnan Province, Xishuangbanna Prefecture, Mengla County, Menglun Town, Entrance to Shenmi Cave, in good forest (21.97332°N, 101.24336°E; 776 m), 3.X.2017, Y. Lin and Y. Li leg.; 1♂ juvenile (NHMSU-HA080) and 1♀ (NHMSU-HA080) used for sequencing, GenBank: MT992000 and MT991999, same data as for preceding.

Diagnosis.

The male of Crassignatha mengla sp. nov. is similar to that of C. baihua sp. nov. and C. quadriventris (Lin & Li, 2009) comb. nov. but differs by the wider and longer embolic tip and the median apophysis lacks a process, rather than a narrower (Fig. 13A, B ), shorter embolic tip and a process on the median apophysis in the latter two (Figs 2A, B , 21A, B ). The female of C. mengla sp. nov. is most similar to C. rostriformis sp. nov. in the vulva configuration but can be easily distinguished by the spermathecae separated by more than one diameter vs. less than one diameter (Figs 13F, G , 25E, F ).

Description.

Male (holotype). Total length 0.72. Carapace 0.36 long, 0.32 wide, 0.36 high. Clypeus 0.16 high. Sternum 0.24 long, 0.20 wide. Abdomen 0.44 long, 0.40 wide, 0.44 high. Length of legs: I 1.24 (0.38, 0.14, 0.30, 0.18, 0.24); II 1.04 (0.28, 0.14, 0.24, 0.14, 0.24); III 0.74 (0.18, 0.10, 0.14, 0.12, 0.20); IV 0.88 (0.24, 0.12, 0.20, 0.12, 0.20).

Somatic characters (Fig. 12A-C ). Coloration: prosoma dark brown. Legs brown-yellow. Abdomen charcoal gray, darker ventrally than dorsally. Prosoma: carapace sub-rounded, surface rough, sculptured. Cephalic area elevated. ALE protruded, PER strongly recurved. Clypeus concave. Mouthparts strongly sclerotized. Labium semicircular. Sternum heart shaped, slightly plump, surface rough, truncated posteriorly. Legs: tibia II with two clasping spurs subdistal-ventrally. Abdomen: nearly rounded dorsally, with lightly sclerotized dots dorsally. Lateral scutum weakly sclerotized, dark brown. Spinnerets brown, with a circular plate.

Palp (Fig. 13A-C ): weakly sclerotized. Cymbium with few setae distally; cymbial tooth thin, located subapically. Tegulum globular and plump. Median apophysis lamellar, with sclerotized margin. Embolic membrane arises behind median apophysis, near embolic base. Embolus short, rigid, basolateral protrusion tapering distally, with a single bend.

Female (paratypes). Total length 1.00. Carapace 0.40 long, 0.36 wide, 0.36 high. Clypeus 0.14 high. Sternum 0.24 long, 0.24 wide. Abdomen 0.64 long, 0.64 wide, 0.60 high. Length of legs: I 1.38 (0.42, 0.14, 0.36, 0.20, 0.26); II 1.14 (0.30, 0.12, 0.30, 0.18, 0.24); III 0.88 (0.26, 0.10, 0.18, 0.14, 0.20); IV 1.10 (0.38, 0.12, 0.24, 0.14, 0.22).

Somatic characters (Fig. 12D-F ). Coloration: prosoma as in male. Abdomen lighter than in male. Prosoma: carapace pear shaped. Cephalic region elevated, slightly lower than in male. PER slightly recurved. Labium triangular, unfused to sternum. Sternum heart shaped, surface rough, slightly plump, truncated posteriorly. Abdomen: anteriorly round, posteriorly nearly square. Spinnerets brown, weakly sclerotized.

Epigyne (Fig. 13D-G ): epigynal area with few setae. Scape short, slightly protruded. Copulatory opening located at terminal part of scape. Internal structures faintly visible via translucent tegument. Spermathecae globose, widely separated by ~1.2 × their diameter. Fertilization ducts short, thin, starting at the inside margin of spermathecae, deflexed, bifurcated distally. Copulatory ducts long, thick, connected to posterior margin of spermathecae, bent upward to center of vulva, then downward, fusing before reaching copulatory opening.

Etymology.

The specific name is derived from the type locality; noun in apposition.

Distribution.

China (Yunnan) (Fig. 38 ).

Figures

Figure 2. Crassignatha baihua sp. nov. A male palp, prolateral B male palp, ventral C male palp, retrolateral D epigyne, ventral E epigyne, lateral F vulva, ventral G vulva, dorsal. Scale bars: 0.10 mm (A-G).

Figure 12. Crassignatha mengla sp. nov. A male habitus, dorsal B male habitus, ventral C male habitus, lateral D female habitus, dorsal E female habitus, ventral F female habitus, lateral. Scale bars: 0.50 mm (A-F).

Figure 13. Crassignatha mengla sp. nov. A male palp, prolateral B male palp, ventral C male palp, retrolateral D epigyne, ventral E epigyne, lateral F vulva, ventral G vulva, dorsal. Scale bars: 0.10 mm (A-G).

Figure 21. Crassignatha quadriventris (Lin & Li, 2009) comb. nov. A male palp, prolateral B male palp, ventral C male palp, retrolateral D epigyne, ventral E epigyne, lateral F vulva, ventral G vulva, dorsal. Scale bars: 0.10 mm (A-G).

Figure 25. Crassignatha rostriformis sp. nov. A male palp, prolateral B male palp, ventral C male palp, retrolateral D epigyne, ventral E vulva, ventral F vulva, dorsal. Scale bars: 0.10 mm (A-F).

Figure 38. Distribution records of Crassignatha spp. in Asia. 1 C. baihua sp. nov. 2 C. bangbie sp. nov. 3 C. bicorniventris 4 C. changyan sp. nov. 5 C. danaugirangensis 6 C. dongnai sp. nov. 7 C. ertou 8 C. gucheng sp. nov. 9 C. gudu 10 C. haeneli 11 C. mengla sp. nov. 12 C. nantou sp. nov. 13 C. nasalis sp. nov. 14 C. pianma 15 C. quadriventris 16 C. quanqu 17 C. rostriformis sp. nov. 18 C. shiluensis 19 C. shunani sp. nov. 20 C. si sp. nov. 21 C. thamphra sp. nov. 22 C. xichou sp. nov. 23 C. yamu 24 C. yinzhi.